Triple-acting press



4 Sheets-Sheet l D. L. CLEVELAND TRIPLE-ACTING PRESS Filed Jan. l0, 1959 Aug. 4, 1942.

S DoN L CLEVELAND ATTORNEY:

'SIEL-U; rs1

Aug. 4, 1942. n. L. CLEVELAND 2,292,054

TRIPLE-ACTING PRESS Filed Jan. 1o. 1959 4 sheets-sheet 2 ATTORNEYS Aug. 4, 1942. D. L. CLEVELAND TRIPLE-ACTING PRESS Filed Jan. 10, 1939 4 Sheets-Sheet 3 QD oN TA NL Ew V N IC .L N o D ATTO p. NEYS Allg' 4g 1942 D. L. CLEVELAND '2,292,054

TRIPLE-ACT1NG PRESS Filed Jan. 10, 1959 4 Sheets-Shea*l 4 INVENTOR 0 DoN L. CLEVELAND l BY I I l ATTORNEYS Patented Aug. 4, 1942 rarrnafaormo mss non n cleveland, man; Gilead, om, wim:

to'l'llellydrallllo Development Corp. Ine., Wilmington, Del., a corporation of Delaware Application January 1 0, 1939, Serial No. 250,222

24 Claims.

This invention relates to-press'es, and in particular, to hydraulic presses having a plurality of rams operating in diiierent assemblies, such as in a triple-acting press.A

One object of this invention is to provide a" hydraulicpress having plungers moving in opposite directions, such as to close a die assembly, and one or more additional plungers to perform further operations upon the die assembly, such as to constrict the die assembly laterally.

Another object is to provide a triple-acting hydraulic press having a main plunger cooperating with an oppositely acting auxiliary plunger to open and close a die assembly, together with at least one' other plunger operative to perform further operations upon the die assembly, such as to move parts thereof in a lateral direction for giving an additional working operation upon the workpiece.

Another object is to provide a triple-acting hydraulic press, as set forth in the preceding object, wherein one or more ejector plungers are provided for electing the workpiece in addition to the three plungers previously mentioned.

Another object is to provide a triple-acting hydraulic press having an expansible and contractable die assembly mounted thereon, with a pair of oppositely acting plungers for opening and closing the die assembly, and for expanding the latter, together with an additional plunger for externally contracting the die assembly; 'and optionally an additional ejector plunger for electing the workpiece after the die assembly has completed its work.

In the drawings:

Figure 1 is a diagrammatic front elevation, partly in section, showing the principal parts of a triple-acting press according to thepresent invention. y

Figure 2 lis a front elevation of a commercial form of press, employing the principles illustrated diagrammatically in Figure 1, with the die assembly omitted for purposes of simplication.

Figure 3 is a left-hand side elevation of the press shown in Figure 2.

Figure 4 is a right-hand side. elevation of the press shown in Figure 2.

Flgalre 5 is a plan view of a portion of the bed of the press illustrated in Figure 2, showing the ejector mechanism.

Figure 6 is a vertical section along the broken line 6-6 in Figure 5.

lil

connection to one of the hollow strain rods shown at the right-hand side of Figure 6.

In general, the triple-acting press of this invention consists of a frame with a plurality of independently acting rams for performing various related operations, such as operating a compound die assembly. The press of the present invention is illustrated as adapted to operate a die with multiple parts for truing rims for pneumatic automobile and truck tires. The press consists of a downwardly acting main plunger which closes the rim-truing die., the lower half Figure 7 is a bottom plan view of the hydraulic 55 of which is mounted upon the'pr'ss bed. An upwardly acting auxiliary plunger serves to expand the die to perform the first truing operation. A third set of plungers operates mechanism for contracting the outer portion of the die so as to complete the rim-truing or squeezing operation, and a fourth set of plungers serves to expel the completed workpiece, which in the embodiment chosen for illustration, is an automobile tire rim.

v Referring to the drawings in detail, Figure 1 shows diagrammatlcally a form of press embodying the principles of the invention. This press,

is provided with a bed I0, a head il, side members l2 and strain rods i3 interconnecting the head Il and bed I0. ll'he opposite ends of the strain rods i3 are threaded and carry nuts I44 for holding the press frame parts together. The strain rods I3 are provided with shouldered portions i5 near their ends, cooperating with the nuts I4 to hold the press bed Il) and head Il therebetween. Stops I6 are also provided on the strain rods I3 for holding the pressplaten, as hereinafter explained.

Mounted in the press head ll is a main cylinder I'I and auxiliary cylinders i8, reciprocably receiving the main plunger I9 and auxiliary plungers 20. 'I'he main plunger I9 is connected, as at 2l, to the main platen 22, which reciprocat vertically with its ends guided in the frame side members l2. At its lower extent of reciprocation the main platen 22 engages the stops I6 on the strain rods i3. The auxiliary plungers 2li are connected to an auxiliary platen 23, which reciprocates independently of the main platen 22 and which is provided with an aperture 24 for accommodating the main plunger I9. Connected to the auxiliary platen 23, as at 25,v are vertically depending posts 2B connected, as at 21, to a connecting member 28 which serves to interconnect the lower ends of the posts 26. Mounted in the bedy i0 of the press is a cylinder 29 containing an upwardly vacting plunger 30 (Figure 6). Bolted to the latter is a plunger a die assembly 3l into 2 y carrying the conical die expander d4. Not shown in Figure 1 but shown in Figures 5 and 6 are ejector plungers, subsequently to be described, for ejecting the workpleces, such as tire rims. Thus, the press contains four diierent plunger assemblies, the main plunger and platen assembly I9, 22, the auxiliary plunger and platen assembly 26, 23, 26, 26, the upwardly acting plunger assembly 29, 36, 44B and the ejector plunger assembly subsequently to be described.

Returning to Figure l, the die assembly. enerally designated 3l, consists of an annular central portion, generally designated 32, secured within an encircling portion 33 and connected to a plate 34 mounted upon the lower sidle of the main platen 22. Spacing elements 35 and 36 are provided between the central annular por.. tion 32 and they mounting plate 3d, the element 36 being mounted in a recess 31. The central annular member 32,0f the die assembly 3I consists of a plurality of segments 36 having enlarged upper portions 36 and lower reduced diameter portions 46. The portions 46 are provided with wear plates di, secured thereto and serving to engage the workpiece. The segments 38 are provided with tapered internal surfaces `42, forming in assembly a conical recess which is engaged by the conical outer surface 43 of the conical die expander 44, the lower portion 45 of which is of reduced diameter and is mounted within the bore 46 'of the plunger 44B connected to the upwardly acting plunger 36. The segments 36 and ,wear plates 4I are forced outward to expand the die assembly when the plungers 30 and 44e and the conical expander 44 rise.

The die assembly 3l is also provided with a split outer unit, generally designated 41, includinga split ring portion 46 and wear plates 49 4disposed in opposition to the wear plates 4I, and

providing an annular space 50 for the reception of the workpiece, such asthe tire rim. The portion 46 is provided with an annular base portion I, secured as at 52, tothe supports 53 mounted upon the press bed I0. Secured to the under sides of the bas'e portions 5I are the members 54. Engaged by the portions 48 are the thrust members 55 having recesses 56 receiving the ends of links 51, the opposite ends of which engage recesses 56 within the members 59 mounted inside the connecting member 26.

In the operation of the press shown diagrammatically in Figure 1, let it be assumed that the main platen 22 and auxiliary platen r23 are raised to their uppermost positions, and that the plunger 36 is in its lowermost position. The upper and lower portions of the die assembly 3I are therefore separated so as to permit the placing of a workpiece therein. A tire rim, or other workpiece, is then inserted in the lower portion of the die, within the hollow inclosed by the wear plates 49. Pressure is then admitted to the upper and lower cylinders I1 and 26, whereupon the main plunger I9 and lower plunger 30 move toward one another. As the main plunger I9 and main platen 22 are assisted bygravity in their downward movement, and preferably aided by a surge valve in admitting uid to the upper portion of the main cylinder I1 to permit this rapid gravitational descent, the main platen I9 reaches its lowermost postion rst and comes to rest against the stops I6 on the strain rods I3, thereby lowering the upper portion of the the lower portion thereof, with the wear plates 4I within the workpiece or tire rim lwhich is to be trued. This clamps the upper and lower portions of the die assembly 3l together.

Meanwhile, the lower plunger 36 rises more slowly, since it is unassisted by gravity, and pushes the conical expander 44 into the conical recess d2, thereby forcing the segments 36 outwardly in radial directions and causing the wear plates 4I to engage the inner portions of the workpiece. At the end of a pressure dwell of predetermined length, the hydraulic circuit is reversed so that the main plunger I6 and lower plunger 36 are retracted by pressure fluid directed to them in the opposite direction from that employed in causing them to perform their forward or working` strokes. Asthe lower plunger 36, however, is now assisted by gravity in its retraction stroke, it reaches its return position before the main plunger I6 and main platen 22, which are 'opposed by gravity.

At the same time that plunger 36 starts its return or retraction stroke, iluid is admitted to the auxiliary cylinder I8, causing the auxiliary plungers 26 andauxiliary platen 23 to move downward, carrying with them the posts 26 and connecting member 26. By this motion the links 51 are caused to push the -split ring portion 46 and wear plates 49 inwardly, thereby giving the nal truing squeeze to the outside of the tire rim, or other workpieces. After this operation lhas been performed the flow of pressure iluid to the auxiliary cylinders I8 is reversed so that the auxiliary plungers 20 and auxiliary platen 23 move upward, carrying with them the posts 26 and outer member 28, and causing the split ring 48 to expand outwardly by reason of the releasing o the force upon the links 51. When the main platen 22 reaches its retracted position, the upper and lower portions of the die assembly 3| are separated and the die is opened. 'Ihey nated. In this press the hydraulically operated plateris 22 and 23 are provided with laterally extending valve actuating arms 66 and 6I for controlling the flow of hydraulic iluid to and from the cylinders I1 and I8. The valve actuating arms 66 and 6I are adapted to engage collars 62 and 63 upon vertically movable control rods 64 and 65, respectively, to move the same. lThe control rods 64 and 65 are also guided at their upper ends in the arms 66 and 61 extending laterally from the press head I I, and are movable manually up or down by the hand wheels68 and 69, operating rack and pinion gearing units 16 and 1|. The control rods 64 and 65 are likewise movable electrically by means of solenoids 12 and, 13 (Figures 3 and 4) through their armatures 14 and 15 and rock arms 16 and 11, the outer ends of which engage collars 18 and 16 upon the control rods 64 and 65, respectively. The control system employed with the presses shown in Figures 2, 3 and 4 forms no part of the present invention.

In order to facilitate the transfer of iiuid between the upper and lower portions of the press, certain of the strain rods I3 are provided with longitudinal bores (Figures 6 and '1), to the ends of which connection is made by the couaaeaosfl plings 8| secured thereto by the U-bolts 82 and clamping plate 03. Pipes 84 and 88 lead respectively from the bored strain rods to the ports 86 and 81 in the upper and lower ends of the lower cylinder 29 (Figure 6), connection being made thereto by the couplings 88 and 89 (Figures 3, 4 and 6). Mounted on the press head II, above the main cylinder Il', is a surge tank 00 for containing the working fluid, this tank being surmounted by an air filter 9|. The strain rods I3 are provided with upper stops 92, corresponding to the lower stops I6, but serving to engage the auxiliary platen Z3 at the lower limit of its travel. The lower cylinder 2S is bolted to the press bed I by a iianged portion 93 thereof, and provided with a packing retainer 0I of annular form and containing an annular recess 95 for receiving a packing which is compressed by the gland 96, bolted thereto. The upper end of the lower plunger 30 (Figure 6) is provided with recesses 91 communicating with bolt holes 98 serving to receive the bolts 99, by which the plunger I4 is connected thereto.

The ejector mechanism by which the tire rims, or other workpieces, are placed in a position for removal consists (Figures 5 and 6) of a rectangular carriage, generally designated |00 having brackets IOI bolted thereto (Figure 5) by way of the cylindrical portion |02. Bolted to the outer ends of the brackets |0| are ejector plungers I 03 which reciprocate in the ejector cylinders |04, mounted in the bores |05 extending through the flanged portion 93 of the lower cylinder 25. The ejector cylinders |04 are closed by cylinder heads |06 containing an annular packing retainer |01 and a packing recess |00 for receiving a packing, the latter being compressible by the gland |09.

The operation of the commercial form of press shown in Figures 2 to 7 is the same as that described in connection with the diagrammatic or simplified form shown in Figure l. The ejector cylinders, however, are provided with lower ports IIO, through whichifluid is admitted when it is desired to raise the ejector. plungers |03 and carriage |00 so as to lift the tire rim, or other workpiece, out of the lower die portion. The ejector plungers |03 return by gravity to their retracted positions when the port .H0 is connected to the discharge or exhaust circuit of the press.

It will be understand that I desire to compre-A hend within my invention such modifications as come Within the scope of the claims and the invention.

Having thus fully described my invention, what I claim as new and desire 12o/secure by Letters Patent, is:

1. In a hydraulic press, a. frame, a die assembly having an expansible portion and a contractable portion, a main ram operatively connected to one of said portions for opening and closing said die assembly, an auxiliary ram operativelyv connected to said contractable portion, a die expander, and a die-expanding ram connected to said die expander.

2. In a hydraulic press, a frame, a die assembly having an expansible portion and a contractable portion, a main ram operatively connected to one of said portions for opening and closing said die assembly, an auxiliary ram operatively connected to said contractable portion, a die expander, a die-expanding ram connected to said die expander, a workpiece ejector, and an ejector ram operatively connected to said workpiece elector.`

3. Ina hydraulic press, a frame, a die assembly having an expanslble portion and a contreatable portion, a main ram operatively connected to one of said portions for opening and closing said die assembly, an auxiliary ram operatively connected to said contractable portion, a die expander, and a die-expanding ram connected to said die expander, said auxiliary ram being movable in' the same direction as said main ram upon the working stroke thereof.

4. In a hydraulic press, a frame, a die assembly having an expansible portion and a contractable portion, a main ram operatively connected to one of said portions for opening and closing said die assembly, an auxiliary ram operatively connected In said contractable portion, a die expander, and a die-expanding ram connected to said die expander, said die-expanding ram being movable in the opposite direction from said main ramupon the working str-oke thereof.

5. In a hydraulic press, a frame, a die assembly having an expansible portion and a contractable portion, a main ram operatively connected to one of said portions for opening and closing said die assembly, an auxiliary ram operatively connected to said contractable portion, a die expander, and a die-expanding ram connected to said die expander, said auxiliary ram being movable in the same direction as said main ram upon the working stroke thereof, said dieexpanding ram being movable in the opposite direction from said main ram upon the working 1 stroke thereof.

6. In a hydraulic press, a frame, a die assembly having an expansible portion and a. contractable portion, a main ram operatively connected to one of said portions for opening and closing said die assembly, an auxiliary ram operatively connected to said contractable portion, a die expander, a die-expanding ram connected to said die expander, a workpiece ejector, and an ejector ram operatively connected to said workpiece ejector, said ejector ram being movable i'n the same direction as said die-expanding ram upon .the working stroke thereof.

'1. In a method of truing hollow w-orkpieces in a multi-part'die, inserting the workpiece in the space between the outer and inner parts of the die, exerting hydraulic pressure for closing the die, hydraulically expanding the inner part of the die outward against the inner wall of the workpiece. squeezing the outer part of the die against the outer wall of the workpiece while gradually relieving the expanding pressure, hydraulically. retracting the die parts, and removing the trued workpiece.

8. In a method of truing hollow work pieces, inserting the work piece in a multi-part die. closing thedie, expanding the inner die surface outwardly against the inner wall of the work piece to expand the same, 'squeezing the outer die surface mwarmy against the outer wan of the work piece while slightly releasing said expanding pressure to contract the same, sepa. I

rating the die parts, and removing the work piece from the die.

9. In a hydraulic press, a, first die portion and a second die portion arranged to act on opposite sides of a work piece, areciprocable main ram adapted to carry the first die portion into cooperating relationship with the second die portion, an 'auxiliary ram operating in the same direction and adapted to move said second die portion angularly with respect 'to the direction of movement of the iirst die portion and in a direction to approach the second die portion, and a die-actuating ram adapted to move said first die portion in a direction toward said second die portion.

10. In a hydraulic press, a rst die portion and a second die portion arranged to act on opposite sides of a work piece, a reciprocable main ram adapted to carry the first die portion into cooperating relationship with the second die portion, an auxiliary ram operating in the same direction and adapted to movesaid second die portion angularly with respect to the direction of movement of the first die portion and in a direction to approach the second die portion, and a die-actuating ram adapted to move said first die portion in a direction toward said second die portion, said main ram and said die-actuating ram operating in. opposite directions.

11. In a hydraulic press, a nrst die portion and a second die portion arranged to act on opposite sides of a work piece, a reciprocable main ram adapted to carry the rst die portion into cooperating relationship with the second die portion, an auxiliary ram operating in 'the same direction and adapted to move said second die portion angularly with respect to the direction of movement of the iirst die portion and in a direction to approach the second die portion, and a die-actuating ram adapted to move said first die portion in a direction toward said second die portion, and an ejector ram adapted to expel.

the work piece from the die.

12. In a hydraulic press, a first die portion and a second die portion arranged to act on opposite sides of a Work piece, a reciprocable main ram adapted to carry the rst die portion into cooperating relationshipl with the second die portion, an auxiliary ram operating in the same direction and adapted to move said second die portion angularly with respect to the direction of movement of the .first die portion and in a direction to approach the second die portion, and a die-actuating ram adapted to move said iirst die portion in a direction toward said second die portion, and an ejector ram adapted to expel the work piece from the die, said main ram and said die-actuating ram operating in opposite directions.

13. In a-hydraulic press, a iirst die portion and a second die portion arranged to act on opposite sides of a work piece, a reeiprocable main ram adapted to carry the first die portion into cooperating relationship with the second die portion, an auxiliary ram operating in the same direction and adapted to move said second die portion angularly with respect to the direction of movement of the iirst die portion and in a direction to approach the second die portion, and a die-actuating ram adapted to move said irst, die portion in a direction toward said second die portion, and an ejector ram adapted to expel the work piece from the die, said ejector ram and said die-actuating ram being mounted adjacent each other in said press.

14. In a hydraulic press, a firstdie portion and a second die portion arranged to act on opposite sides of a Work piece, a reciprocable main ram, a main platen. connected to said main ram and adapted to carry said first die portion into cooperating relationship with the second 'die portion, an auxiliary ram, an auxiliary platen connected to said auxiliary. ram, said auxiliary ram and platen operating in the same direction as said main ram, and adapted to move said second die portion angularly with respect to the direction of movement of the nrst die portion, and in a direction to approach the second die portion, and a die-actuating ram adapted to move said rst die portion in a direction toward said second die portion.

15. In a hydraulic press, a iirst die portion `and a second dieportion arranged to act on opposite sides of a work piece, a reciprocable main ram, a main platen connected to said main ram and adapted to carry said rst die portion into cooperating relationship with the second die portion, an auxiliary ram, an auxiliary platen connected to said auxiliary ram, said auxiliary ram and platen adapted to move said second die portion angularlywvith respect to the direction of movement of the rst die portion, and in a direction to approach the second die portion, .and a die-actuating ram adapted to move said iirst die portion in a direction toward said second die portion, said auxiliary ram being mounted beside said main ram and movable in the same direction upon the working stroke thereof.

16. Ina hydraulic press, a frame, a nrst die portion and a second die portion arranged to act on opposite sides of a Work piece, a reciprocable main ram, a main platen connected to said main ram and adapted to carry said rst die portion into cooperating relationship with the second die portion, an. auxiliary ram, an auxiliary platen connected to said auxiliary ram, said auxiliary ram and platen operating in the same direction as said main ram, and adapted to move said second die portion angularly with respect to the direction of movement of the first die portion, and in a direction to approach the second die portion, and a die-actuating ram adapted to move said rst die portion in a direction to- -ward said second die portion, said die-actuating die portion, an auxiliary ram, an auxiliary platen connected to said auxiliary ram, said auxiliary ram and platen operating in the same direction as said main ram, and adapted to move said second die portion angularly with respect to the direction of movement of the first die portion, and in a direction to approach the second die portion, and a die-actuating ram adapted to move said rst die portion in a direction-toward said second die portion, said auxiliary ram being mounted beside said main ram and movable in the same direction upon the working stroke thereof, said die-actuating ram being mounted at the opposite end of said frame from said main ram and movable in the opposite direction upon the working stroke thereof.

18. In a hydraulic press, a first die portion and a second die portion arranged to act on opposite sides of a work piece, a reciprocable main ram,

a main platen connected to said main ram and to said auxiliary ram. said auxiliary `,ram and platen operating in the same direction as said main ram, and adapted'to move said second die portion angularly with respect to the direction o! movement of the nrst die portion, and in a direction to approach the second die portion, and a die-actuating ram adapted to move said iirst die portion'in a direction toward said second die portion, and an ejector ram adapted to eject the work piece from the die.

19. In a hydraulic press, a iirst die portion and a second die portion arranged to act on opposite sides of a work piece, a reciprocable main ram, a main platen connected to said main ram and adapted to carry said first die portion into cooperating relationship with the second dieportion. an auxiliary ram, an auxiliary platen connected to said auxiliary ram, said auxiliary ram and lplaten operating in the same direction as lsaid main ram, and adapted to move said second die portion angularly with respect to the direction oi movement of the first die portion, and in a direction to approach the second die portion, and a die-actuating ram adapted to move said iirst die portion in a direction toward said second die portion, and an ejector ram adapted to eject the work piece from the die, said auxiliary ram being mounted' beside said main ram and movable in the same direction upon the working stroke thereof.

20. In a hydraulic press, a frame. a nrst die portion and a second die portion arranged to act on opposite sides of a work piece, a reciprocable main ram, a main platen connected to said main ram and adapted to carry said rst die portion into cooperating relationship with the second die portion, an auxiliary ram, an auxiliary platen connected to said auxiliary ram, said auxiliary ram and platen operating in the same direction as said main ram and adapted to move said second die portion angularly with respect to the direction of movement of the first die portion, and in a direction to approach the second die portion, and a die-actuating ram adapted to move said iirst die portion in a direction toward said second die portion, said die-actuating ram being mounted at the opposite end ot said frame from said main ram and movable in thel opposite direction upon the working stroke thereof.

21. In a hydraulic press, a first die portion and a second die portion arranged to act on opposite sides oi' a work piece, a reciprocable main ram, amainplatenconnectedtosaidmainramand adapted t'o carry said ilrst die portion into cooperating relationship with the second die portion, an auxiliary ram, and an auxiliary platen connected to said auxiliary ram, said auxiliary ram and platen operating in the same direction as said main ram,.9nd adapted to move said second die portion angularly with respect to the direction of movement of the,iirst die portion, and in a direction to approachthe second die portion, and a die-actuating ram adapted to move said first die portion in a direction toward said second die portion, an ejector ram, said ejector ram being mounted adjacent said die-actuating ram.

22. In a hydraulic press, a first die portion and a second die portion arranged to act on opposite sides o1' a work piece, a reciprocable main ram,

a main platen connected to said main ram and adapted to carry said iirst die portion into cooperating relationship with the second die portion, an auxiliary ram, and an auxiliary platen connected to said auxiliary ram, said auxiliary ram and platen operating in the same direction as said main ram, and adapted to move said second die portion angularly with respect to the direction ot movement of the iirst die portion, and in a direction to approach the second die portion, and a die-actuating ram adapted to move said first die .portion in a direction toward said secondgdie portion, an ejector ram, said ejector ram being mountedadjacent said die-actuating ram, and movable in the same direction upon the working stroke thereof.

23. In a hydraulic press, a iirst die portion and a second die portion arranged to act on opposite sides of a work piece, a reciprocable main ram adapted to carry the iirst die portion into cooperating relationship with the second die portion, an auxiliary ram operating in the same direction and adapted to move said second die portion angularly with respect to the direction of movement of the first die portion and in a direction to approach the second die portion, and a dieactuating ram adapted to move said first die portion in a direction toward said second die portion, and an ejection plunger carried by said ram and surrounding said die-actuating ram.

24. In a hydraulic press, a iirst die portion and a second die portion arranged to act on opposite sides of a work piece, a reciprocable main ram adapted to carry the first die portion into cooperating relationship with the second die portion. an auxiliary -ram operating in the same direction and adapted to move said second die portion angularly with respect to the direction of movement of the first die portion and in a direction to approach the second die portion, and a dieactuating ram adapted to move said iirst die portion in 'a direction toward said second die portion, and an ejection plunger carried by said ram reciprocably Journaled on said die-actuating Ilm.

DON L. CLEVELAND. 

